When I first looked at this painting I immediately thought: AWWW PRETTEHH! But since that's not very appropiate for a critique, I will say some other things too.
I think it is a very beautiful painting, as you have probably noticed, and the use of colours is done with an extremely good technique. The combination of white, blue and pink is just wonderful and truly gives it a nice effect.
The overall composition is great, with all the trees, and the mountains at the background. The only thing I'm wondering is what that dark blue spot is on the right, in the air. Is it a cloud? I have no idea, and you could possibly have kept it out of the painting.
As I already said, I absolutely love the colours and even though I don't know a lot of painting/drawing, I can clearly see you have a talent and your technique is amazing!